user
Design a puzzle with the following facts:
Two brothers are playing cards.
There are a total of 36 cards.
Each brother has 18 cards.


assistant
The puzzle is to determine the number of cards of each value that each brother has. There are four different card values (1-4) and nine cards of each value. The puzzle is solved when the number of cards of each value is determined for each brother. For example, if Brother A has four cards of value 1, Brother B must have five cards of value 1.